Moistener for duplicating apparatus



March 17, 1936. R TZERFELD 2,034,209

MOISTENER FOR DUPLICATING APPARATUS Filed June 21, 1932 W Fi l evf el L Patented Mar. 17, 1936 UNITED STATES MOISTENER FOB DUPLIOA'I'ING ArrAnA'rUs I Wilhelm Ritzerfeld, Berlin, Germany Application June 21, 1932, Serial No. 618,570

Germany June 23, 1931 4 Claims. (Cl. 91-39) This invention relates to a moistening device for duplicating apparatus of the type in which the paper to receive the impressionis previously m'oistened'with a rapidly volatilizing liquid, in order that a large number of impressions may be obtained from one'original, which for this purpose is furnished with reverse script from which the copies are derived by transfer.

Duplicating apparatus of this nature are quite well known. The sheet to be furnished with the impression is moistened by means of a piece of felt or the like, which is secured in a completely enclosed casing filled with an absorptive material, such as felt, cotton wool, etc. The liquid is fed to the moistening container, or to a distributing pipe located therein, by means of a pipe or the like and a regulable drip device.

These moistening devices are accompanied by the disadvantage that the liquid is stored in a special supply tank or reservoir, from which the,

' liquid requires to be conducted to the actual dis-' tributing pipe. Further; the reservoir, which heretofore has been mounted on the side of the apparatus, is at this point extremely liable to damage.

It is, therefore, the primary object of this invention to overcome the disadvantages, referred to, and this is accomplished by reason of the construction hereinafter described.

Other objects and advantages of the invention will become apparent as the description proceeds.

According to the invention. a moistening device is employed, in which the special supply tank or reservoir is dispensed with. In lieu thereof there is situated immediately above the moistening felt a regulable supply tank, which conducts the'liquid to the felt in direct fashion. The feed pipe, etc., required for the molstening apparatus hitherto in use is accordingly rendered unnecessary. The supply tank is provided with a regulable valve, for instance a screw valve, which enables the liquid to drip or pass in continuous flow as desired. For the purpose of ascertaining the from a supply tank into anabsorptive material,

such as felt; cotton wool, wick material or the like, in which the same is readily distributed, and

10f embodiment,

' liquid in the tank may be determined with the The liquid this material conveys the liquid to the actllal moistener, so that the liquid is evenly distributed throughout the moistening felt with correspondingly even moistening of the sheet ,of. paper on which the impression is to be made. Alternatively, the. liquid may be allowed to drip or flow onto the moistening felt in immediate fashion. The invention will now be described more fully with reference to the accompanying drawing,

which illustrates the invention in two possible 10 forms of embodiment.

Fig. 1 is a cross-sectional view of the one form Fig. 2 being a front elevation.

Fig. 3 illustrates an alternative form of embodiment.

Referring now to the drawing, the moistener is arranged immediately in front of and between the rollers l and 2. This moistener extends over the entire width of the apparatus. The moistening felt it! is supported by the upper plate 8 and the lower plate 9, which at the same time constitute the container. The two plates are secured to the transverse member if by means of screws means of which the liquid is able to drip or pass in continuous flow as desired. The quantity of assistance of the window 5.

1 Container 3 is provided with a cylindrical member l6 rigidly connected thereto and adapted to rotatably support dish or cup i. A plurality of apertures it is provided on cup ii co-operating with corresponding apertures on the upper sur= face of container 3 which may be opened and closed by rotation of the cup. The inner surface of cylindrical member i6 is threaded to receive and to adjustably hold threaded valve 6. The lowerconlcal end i5 of valvefi is seated in the discharge opening ll.

When it is desired to fill the container, the cup I is rotated until its apertures I 4 register with the corresponding apertures of the container. The liquid now may be poured into the cup which is communicating with the container. After the container is filled, by slightly rotating cup I, the co-operating apertures may be brought out of alignment and the container is closed. By tuming valve 6 its conical end I! may be lifted from its seat to a smaller or larger extent whereby a regulated amount-of. liquid may be caused to drip or'to flow from the container. The liquid drips or runs iron. the tank 3 on to the absorptive projecting from It will be understood that no restriction is made to the specific forms of embodiment shown, and that various modifications are quite possible without departing from the spirit of the invention.

What I claim as newand desire to secure by Letters Patent is:

1; Moistening device for duplicating apparatus and the like comprising in combination, a pad casing open at the bottom, a pad in said casing the bottom opening thereof, a liquid reservoir directly mounted on and supported by said casing and communicating therewith through registering apertures in the bottom of said reservoir and the top of said casing, a tray displaoeably mounted on saidreservoir and formed with a perforation adapted to register with a perforation in the top of said reservoir and a needle valve extending through said tray, the top and bottom of said reservoir and the top of said casing.

2. In a duplicating apparatus printing from a copyable original onto sheets previously moistened with a rapidly volatilizing solvent, a moistening device comprising in combination a pad housing open at the bottom, a pad substantially filling said housing and protruding through the bottom opening thereof, a container for said rapidly volatilizing solvent mounted on and supported by said housing and communicating thererapidly distributed and then.

- and'bottom of said container.

WILHEIM with through registering apertures in the bottom of said container and in the top of said housing, and a needle valve protruding through the top and bottom of said container.

3. In a duplicating apparatus printing from a copyable original onto sheets previously moistened with a rapidly volatilizing solvent, a moistening device comprising in combination a pad housing open at the bottom including two metal plates arranged in spaced relationship to form a flat, elongated chamber. a pad substantially filling said chamber and protruding through the bottom opening thereof, a container for said rapidly volatilizing solvent mounted on and supported by said housing and communicating therewith-through registering apertures in the bottom of said container and the top of said housing, anda needle'valve protruding through the top and bottom of said container.

4. In a duplicating apparatus printing from a copyable original onto sheets previously moistened with a rapidly volatilizing solvent, a mois tening device comprising in combination a pad housing open at the bottom, a pad substantially filling the lower part of said housing and protruding through the bottom opening thereof, a container for said rapidly volatilizing solvent mounted on and supported by said housing and communicating therewith through registering apertures in the bottom of said container and in the top of said housing, a body of absorptive material in said housing between the top end of said pad and the bottom of said container, and a needle valve protrudng through the top arr-mm. 

